Quote:
Originally Posted by Scott@HKSUSA
Good stuff! I've never heard this warning before; has anyone reported or documented a case of corrupting a calibration via. cell phone?
One additional tip I can add from experience - don't tune with a battery charger connected to the car and NEVER EVER EVER connect/disconnect a battery charger while you are live (connected) with a ECU.
This has corrupted cals and firmware on me (we all learn the hard way, right?). It can/will change ground planes, sensor outputs, injector offsets, all kinds of ECU values, etc...
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Again i am probably being over cautious.
mobile phone transmitt signals even if you not on a call. I doubt many of the flashing devices or cables are fully RF shielded so its theoreticly possible that the transmissions from a phone in very close proximity to cable or flashing tool could cause a problem, this would be unlikely though.
Yes modern battery chargers are not like the old transformer types that charged at a constant voltage. Modern switchmode or pulse charge battery chargers introduce transient voltages into system.
Subaru\toyota have a special type of battery stabiliser i think they call it that they attach during flashing.